Re: Interval subtracting

Milorad Poluga написа:
> Hi all,
> 
> Is there something incorrect in the above query ? 
> SELECT '10 years 1 mons 1 days'::interval - '9 years 10 mons 15 days'::interval
> 
>  ?column?        
>  --------------- 
>  3 mons -14 days 
> 
> Why not '2 mons  16 days' ? 
> 
> /version =  PostgreSQL 8.0.4 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) /


How many days are there in a month?

-- 
Milen A. Radev